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Proc Natl Acad Sci U S A

Title:		Volatile chemical product emissions enhance ozone and modulate urban chemistry
Author(s):		Coggon MM; Gkatzelis GI; McDonald BC; Gilman JB; Schwantes RH; Abuhassan N; Aikin KC; Arend MF; Berkoff TA; Brown SS; Campos TL; Dickerson RR; Gronoff G; Hurley JF; Isaacman-VanWertz G; Koss AR; Li M; McKeen SA; Moshary F; Peischl J; Pospisilova V; Ren X; Wilson A; Wu Y; Trainer M; Warneke C;
Address:		"Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309; matthew.m.coggon@noaa.gov. Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305. Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309. Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD 21250. National Oceanic and Atmospheric Administration Cooperative Science Center for Earth System Sciences and Remote Sensing Technologies, The City College of New York, New York, NY 10031. Department of Electrical Engineering, The City College of New York, New York, NY 10031. Langley Research Center, National Space and Aeronautical Administration, Hampton, VA 23666. Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO 80305. Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061. Tofwerk AG, 3600 Thun, Switzerland. Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD 20740. Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66045"
Journal Title:		Proc Natl Acad Sci U S A
Year:		2021
Volume:		118
Issue:		32
Page Number:		-
DOI:		10.1073/pnas.2026653118
ISSN/ISBN:		1091-6490 (Electronic) 0027-8424 (Print) 0027-8424 (Linking)
Abstract:		"Decades of air quality improvements have substantially reduced the motor vehicle emissions of volatile organic compounds (VOCs). Today, volatile chemical products (VCPs) are responsible for half of the petrochemical VOCs emitted in major urban areas. We show that VCP emissions are ubiquitous in US and European cities and scale with population density. We report significant VCP emissions for New York City (NYC), including a monoterpene flux of 14.7 to 24.4 kg ?na d(-1) ?na km(-2) from fragranced VCPs and other anthropogenic sources, which is comparable to that of a summertime forest. Photochemical modeling of an extreme heat event, with ozone well in excess of US standards, illustrates the significant impact of VCPs on air quality. In the most populated regions of NYC, ozone was sensitive to anthropogenic VOCs (AVOCs), even in the presence of biogenic sources. Within this VOC-sensitive regime, AVOCs contributed upwards of approximately 20 ppb to maximum 8-h average ozone. VCPs accounted for more than 50% of this total AVOC contribution. Emissions from fragranced VCPs, including personal care and cleaning products, account for at least 50% of the ozone attributed to VCPs. We show that model simulations of ozone depend foremost on the magnitude of VCP emissions and that the addition of oxygenated VCP chemistry impacts simulations of key atmospheric oxidation products. NYC is a case study for developed megacities, and the impacts of VCPs on local ozone are likely similar for other major urban regions across North America or Europe"
Keywords:		"Air Pollutants/*analysis/chemistry Air Pollution Cities Environmental Monitoring/methods Europe Humans Models, Theoretical Monoterpenes/analysis New York City Nitrogen Oxides/analysis/chemistry Odorants/analysis *Ozone Population Density Vehicle Emissions;"
Notes:		"MedlineCoggon, Matthew M Gkatzelis, Georgios I McDonald, Brian C Gilman, Jessica B Schwantes, Rebecca H Abuhassan, Nader Aikin, Kenneth C Arend, Mark F Berkoff, Timothy A Brown, Steven S Campos, Teresa L Dickerson, Russell R Gronoff, Guillaume Hurley, James F Isaacman-VanWertz, Gabriel Koss, Abigail R Li, Meng McKeen, Stuart A Moshary, Fred Peischl, Jeff Pospisilova, Veronika Ren, Xinrong Wilson, Anna Wu, Yonghua Trainer, Michael Warneke, Carsten eng Research Support, Non-U.S. Gov't 2021/08/04 Proc Natl Acad Sci U S A. 2021 Aug 10; 118(32):e2026653118. doi: 10.1073/pnas.2026653118"